Improvement in water-wheels



2 Smerp-Sheen,

l. TYLER. Waterlwheeis.

Patented Feb.10,18 .74.

YY TNE SSB-l.

NITED STATES PATENT OFFICE.

JOHN TYLER, OF CLAREMONT, NEYV HAMPSHIRE.

IMPROVEMENT IN WATERWH EELS.

Specication forming part of Letters Patent No. 147,351, dated February 10, 1874 application filed s December 27, 1873.

To alt whom it may concern:

Beit known that I, JOHN TYLER, ot" Claremont, in the county of Sullivan and `State of New Hampshire, have invented a new and Improved Tater -lVheeh of which the following is a specication:

My invention relates to turbine waterwheels, a-nd is an improvement on the buckets shown in the Letters Patent granted to ine July 8, 1856, extended and reissued, and the Letters Patent dated August 20, 1872; and the invention consistsin a novel construction and arrangement of buckets combined with a central bucket-head, and has for its object to improve the etlicieiicy and increase the power' ot' the wheel, as will be fully set forth hereatter.

Figure I is a side elevation; Fig. 2, a plan view of the bottom of the wheel. Fig. 3 is a vertical transverse section through rv .1', Fig. L. Figs. 4 and 5 are side and edge views ot' the bucket; and Fig. 6 is a perspective view, showing the position of the buckets between the head and rim ofthe wheel.

A A represent the bucket-head, which is curved, as shown in'I+`ig.` 3, being similar in shape to-a frustum of an inverted bell. This head has been the subject ot Letters Patent granted to me, and is fully illustrated and described in my before-mentioned patents. A particular description ot' it will, therefore, be unnecessary. B represents the buckets, and (l a ring or band encircling their lower extremities. These buckets are peculiarly formed. ly referring' to Figs. et, 5, and (i, it will be observed that they are twisted, the axis a :c of the twist passing through the opposite angles ot' the bucket. lt will also be seen that the lines bounding the edges c j' of the buckets are arcs of circles. The outer edge g is a continuation of the edge j, which joins the ring C, the slight deviation f being for the purpose of lapping the edge over the round upper edge of the ring C, as shown in Fig. 6. lt will be observed that, aside from this deviation, the outer edge f, which joins the ring C, is an are of a circle. The inner edge e, joining the head A, is also the are of a circle, the slight deviation e being for the accommodation of the bucket, which turns slightly aroimd the head at this point.

The water, on entering the wheel, strikes a full curved surface, formed by the curved section of the bucket on t-he line h h., from the point of the junction of the outer edgeot the bucket with the upper edge of the ring C to the lower point of the upper edge of the bucket.

In the pattern of the wheel, the buckets are made detachable from the head and rim, and, the wheel being cast in a three-part flask, the ring is molded in the bottom part, the head in the top, and the buckets in the middle seetion, of the tlask. The head is then taken ott' and the buckets drawn out. This could not be accomplish ed with any other curved bucket, unless the curves were all arcs ot' circles running in the same direction.

ln the buckets ot' my wheel there are no abrupt curves or irregular surfaces to suddenly change the direction of the water 5 but the bucket is a portion of a twist, as before mentioned, and its edges, which join the head and ring, are bounded by arcs of truc circles. The buckets are inclined tangentially to the head A to create reaction, and also to the axis of the wheel, for the purpose of bringing the weight of the head of water to bear on the buckets, and thus act by impingement as well as reaction, as shown in Figs. l and 6, where the buckets outer edge g is seen commencing at the point c on the rim of the head, and joiningtlie ring C at the point b, thus makin an angle with the axis ofthe wheel.

This principle ot' constructingbuckets is a great improvement upon the old ones, as is demonstrated by scientific and practical tests, in which a wheel constructed in accordance with the present invention gives seven (T) per cent. more power than any wheel heretofore made by me, all the different wheels being run in the same curb with the same head of water.

I claiml. In combination with the curved head A and rim C, the twisted buckets B1, the edges c j' of which, joining the head A and rim C, are bounded by arcs of circles, constructed and operatingsubstantially as described and specitied.

2. The combination, with a water-wheel, ot' the twisted buckets B, constructed and operating substauti ally as described and specified.

JOHN TYLER.

Titnesses A. T. BATGHELDER, WM. 'BALLoorL l Y i 'i 

